package week4;

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See
 * the NOTICE file distributed with this work for additional information regarding copyright ownership. The
 * ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file
 * except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 *
 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing,
 * software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR
 * CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing
 * permissions and 015 * limitations under the License. 016
 */
import java.io.BufferedReader;

import org.w3c.dom.*;

import javax.xml.parsers.*;

import java.io.*;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Date;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.CharArraySet;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.LongPoint;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.StringField;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.Term;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.jsoup.Jsoup;
import org.jsoup.parser.Parser;

/**
 * Index all text files under a directory. 048 *
 * <p>
 * 049 * This is a command-line application demonstrating simple Lucene indexing. 050 * Run it with no command-line
 * arguments for usage information. 051
 */
public class IndexFilesNew {

	private IndexFilesNew() {
	}

	/** Index all text files under a directory. */
	public static void main(String[] args) {
		String usage = "java org.apache.lucene.demo.IndexFiles"
				+ " [-index INDEX_PATH] [-docs DOCS_PATH] [-update]\n\n"
				+ "This indexes the documents in DOCS_PATH, creating a Lucene index"
				+ "in INDEX_PATH that can be searched with SearchFiles";
		String indexPath = "index";
		String docsPath = "data";
		boolean create = true;
		for (int i = 0; i < args.length; i++) {
			if ("-index".equals(args[i])) {
				indexPath = args[i + 1];
				i++;
			} else if ("-docs".equals(args[i])) {
				docsPath = args[i + 1];
				i++;
			} else if ("-update".equals(args[i])) {
				create = false;
			}
		}

		if (docsPath == null) {
			System.err.println("Usage: " + usage);
			System.exit(1);
		}

		final Path docDir = Paths.get(docsPath);
		if (!Files.isReadable(docDir)) {
			System.out.println("Document directory '" + docDir.toAbsolutePath() + "' does not exist or is not readable, please check the path");
			System.exit(1);
		}

		Date start = new Date();
		try {
			System.out.println("Indexing to directory '" + indexPath + "'...");

			Directory dir = FSDirectory.open(Paths.get(indexPath));
			Analyzer analyzer = new StandardAnalyzer(CharArraySet.EMPTY_SET);
			IndexWriterConfig iwc = new IndexWriterConfig(analyzer);

			if (create) {
				// Create a new index in the directory, removing any
				// previously indexed documents:
				iwc.setOpenMode(OpenMode.CREATE);
			} else {
				// Add new documents to an existing index:
				iwc.setOpenMode(OpenMode.CREATE_OR_APPEND);
			}

			// Optional: for better indexing performance, if you
			// are indexing many documents, increase the RAM
			// buffer. But if you do this, increase the max heap
			// size to the JVM (eg add -Xmx512m or -Xmx1g):
			//
			// iwc.setRAMBufferSizeMB(256.0);

			IndexWriter writer = new IndexWriter(dir, iwc);
			indexDocs(writer, docDir);

			// NOTE: if you want to maximize search performance,
			// you can optionally call forceMerge here. This can be
			// a terribly costly operation, so generally it's only
			// worth it when your index is relatively static (ie
			// you're done adding documents to it):
			//
			// writer.forceMerge(1);

			writer.close();

			Date end = new Date();
			System.out.println(end.getTime() - start.getTime() + " total milliseconds");

		} catch (IOException e) {
			System.out.println(" caught a " + e.getClass() +
					"\n with message: " + e.getMessage());
		}
	}

	/**
	 * 135 * Indexes the given file using the given writer, or if a directory is given, 136 * recurses over files and
	 * directories found under the given directory. 137 * 138 * NOTE: This method indexes one document per input file.
	 * This is slow. For good 139 * throughput, put multiple documents into your input file(s). An example of this is
	 * 140 * in the benchmark module, which can create "line doc" files, one document per line, 141 * using the 142 * <a
	 * href="../../../../../contrib-benchmark/org/apache/lucene/benchmark/byTask/tasks/WriteLineDocTask.html" 143 *
	 * >WriteLineDocTask</a>. 144 * 145 * @param writer Writer to the index where the given file/dir info will be stored
	 * 146 * @param path The file to index, or the directory to recurse into to find files to index 147 * @throws
	 * IOException If there is a low-level I/O error 148
	 */
	static void indexDocs(final IndexWriter writer, Path path) throws IOException {
		if (Files.isDirectory(path)) {
			Files.walkFileTree(path, new SimpleFileVisitor<Path>() {
				@Override
				public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
					try {
						indexDoc(writer, file, attrs.lastModifiedTime().toMillis());
						//indexDocScenes(writer, file, attrs.lastModifiedTime().toMillis());

					} catch (IOException ignore) {
						// don't index files that can't be read.
					}
					return FileVisitResult.CONTINUE;
				}
			});
		} else {
			indexDoc(writer, path, Files.getLastModifiedTime(path).toMillis());
			//indexDocScenes(writer, path, Files.getLastModifiedTime(path).toMillis());

		}
	}

	/** Indexes a single document */
	static void indexDocOriginal(IndexWriter writer, Path file, long lastModified) throws IOException {
		try (InputStream stream = Files.newInputStream(file)) {
			// make a new, empty document
			Document doc = new Document();

			// Add the path of the file as a field named "path". Use a
			// field that is indexed (i.e. searchable), but don't tokenize
			// the field into separate words and don't index term frequency
			// or positional information:
			Field pathField = new StringField("path", file.toString(), Field.Store.YES);
			doc.add(pathField);

			// Add the last modified date of the file a field named "modified".
			// Use a LongPoint that is indexed (i.e. efficiently filterable with
			// PointRangeQuery). This indexes to milli-second resolution, which
			// is often too fine. You could instead create a number based on
			// year/month/day/hour/minutes/seconds, down the resolution you require.
			// For example the long value 2011021714 would mean
			// February 17, 2011, 2-3 PM.
			doc.add(new LongPoint("modified", lastModified));

			// Add the contents of the file to a field named "contents". Specify a Reader,
			// so that the text of the file is tokenized and indexed, but not stored.
			// Note that FileReader expects the file to be in UTF-8 encoding.
			// If that's not the case searching for special characters will fail.
			doc.add(new TextField("contents", new BufferedReader(new InputStreamReader(stream, StandardCharsets.UTF_8))));


			// Indexing personae in plays

			String persona = "";

			String xml = readFile(file.toString(), StandardCharsets.UTF_8);
			String extension = "";
			int i = file.toString().lastIndexOf('.');
			if (i > 0) {
			    extension = file.toString().substring(i+1);
			}
			if(extension.equals("xml")){



				org.jsoup.nodes.Document newdoc = Jsoup.parse(xml,file.toString(),Parser.xmlParser());


				for (org.jsoup.nodes.Element e : newdoc.select("persona")) {
					persona += " ; " + e.text();

				}

			}

			doc.add(new TextField("persona", persona, Field.Store.NO));


			// Indexing stagedir


			String stagedirs = "";

			String xml1 = readFile(file.toString(), StandardCharsets.UTF_8);
			String extension1 = "";
			int j = file.toString().lastIndexOf('.');
			if (j > 0) {
			    extension1 = file.toString().substring(j+1);
			}
			if(extension1.equals("xml")){



				org.jsoup.nodes.Document newdoc = Jsoup.parse(xml1,file.toString(),Parser.xmlParser());


				for (org.jsoup.nodes.Element e : newdoc.select("stagedir")) {
					stagedirs += " ; " + e.text();

				}

			}

			doc.add(new TextField("stagedir", stagedirs, Field.Store.NO));


			if (writer.getConfig().getOpenMode() == OpenMode.CREATE) {
				// New index, so we just add the document (no old document can be there):
				System.out.println("adding " + file);
				writer.addDocument(doc);
			} else {
				// Existing index (an old copy of this document may have been indexed) so
				// we use updateDocument instead to replace the old one matching the exact
				// path, if present:
				System.out.println("updating " + file);
				writer.updateDocument(new Term("path", file.toString()), doc);
			}
		}
	}


	static void indexDoc(IndexWriter writer, Path file, long lastModified) throws IOException {
		try (InputStream stream = Files.newInputStream(file)) {

			String xml = readFile(file.toString(), StandardCharsets.UTF_8);
			String extension = "";
			int i = file.toString().lastIndexOf('.');
			if (i > 0) {
			    extension = file.toString().substring(i+1);
			}
			if(extension.equals("xml")){



				org.jsoup.nodes.Document newdoc = Jsoup.parse(xml,file.toString(),Parser.xmlParser());

				String playTitle = newdoc.select("title").get(0).text();

				for(org.jsoup.nodes.Element act : newdoc.select("act")) {

				String actTitle = act.select("title").get(0).text();

				for (org.jsoup.nodes.Element sceneElement : act.select("scene")) {


					String scene = sceneElement.select("title").get(0).text();

					String stagedir = sceneElement.select("stagedir").get(0).text();



					for (org.jsoup.nodes.Element speech : sceneElement.select("speech")) {

					Document doc = new Document();

					Field pathField = new StringField("path", file.toString(), Field.Store.YES);
					doc.add(pathField);

					doc.add(new LongPoint("modified", lastModified));

					doc.add(new TextField("contents", speech.text(), Field.Store.NO));

					String speaker = speech.select("speaker").get(0).text();

					doc.add(new TextField("speaker", speaker, Field.Store.YES));

					doc.add(new TextField("title", playTitle,Field.Store.YES));

					doc.add(new StringField("act", actTitle,Field.Store.YES));

					doc.add(new TextField("scene", scene,Field.Store.YES));

					doc.add(new TextField("stagedir", stagedir,Field.Store.YES));


					if (writer.getConfig().getOpenMode() == OpenMode.CREATE) {
						// New index, so we just add the document (no old document can be there):
						System.out.println("adding " + file);
						writer.addDocument(doc);
						//System.out.println(doc);
					} else {
						// Existing index (an old copy of this document may have been indexed) so
						// we use updateDocument instead to replace the old one matching the exact
						// path, if present:
						System.out.println("updating " + file);
						writer.updateDocument(new Term("path", file.toString()), doc);
					}

				}}
				}

			}




		}
	}

	static String readFile(String path, Charset encoding)
			  throws IOException
			{
			  byte[] encoded = Files.readAllBytes(Paths.get(path));
			  return new String(encoded, encoding);
			}
}
